Indal Handbook For Aluminium Busbar Hot |top| Jun 2026

Finally, the INDAL handbook notes that dry aluminium joints are a gamble. At 100°C (emergency overload), the oxide layer thickens exponentially, acting as a thermal diode. The solution isn't thicker bars—it's interface compound. A zinc-filled joint compound breaks the oxide film under heat, creating a cold-weld. A busbar running at 90°C with compound is safer than one at 65°C dry.

Use a high-quality, high-temperature oxidation-inhibiting compound (grease filled with zinc particles) to seal the joint from moisture and air. indal handbook for aluminium busbar hot

Belleville washer (coned-disc spring) sets must be used on all bolts. These springs maintain pressure on the joint even when the aluminium expands and contracts, preventing loosening. Finally, the INDAL handbook notes that dry aluminium